Gas-engine.



U. K. SALISBURY.

GAS ENGINE.

APPLICATION FILED 001'. 28, 1911.

1,129,421 Patented Feb. 23, 1915.

3 SHEETS-SHEET l.

G. K. SALISBURY.

. GAS ENGINE. APPLIOATION FILED 001228, 1911.

1,1Q9,%2@, Patented Feb. 23, 1915 3 SHEETS-SHEET 2.

O. K. SALISBURY.

GAS ENGINE.

APPLICATION FILED OCT. 28, 1911.

1,1 .13 9A2, Patented Feb. 23, 1915x 3 SHEETS-HEET 31 THE NORRIS PETERS CO PHOTO-LITHO. WASHINGIUN. D c

TD %TAT% PATNT @FTQE.

CHARLES K. SALISBURY, 0F MIIIWAUKEE, WISCONSIN, ASSIGNOR TO STANDARD SEPARATOB. COMEANY, 0F MILWAUKEE, WISCONSIN, A CORPORATION OF NEW JERSEY.

GAS-ENGINE 1,i29,et26.

Application filed. October 28, 1911.

To all whom it may concern:

Be it known that I, CHAnLns K. SALIs- BURY, a citizen of the United States, and resident of Milwaukee in the county of Milwaukee and State of Wisconsin, have invented new and useful Improvements in Gas-Engines, of which the following is a description, reference being had to the accompanying drawings, which are a part of this specification.

This invention relates to gas engine con struction and is particularly designed for a gas engine forming part of an automatic cream separator, though it is capable of general application, and the object of the invention is to mount the engine driven parts of the engine structure, such as the governor, the exhaust valve operating cam mechanism, the switch contacts for the ignition system and the like on a removable plate constituting the cover for an opening in the crank case and actuating such parts by means of a supplemental shaft journaled in the plate and provided with a connection for readily coupling it' with the crank shaft of the engine. This gives free accessibility to the interior of the crank case without having to dismember the engine driven parts of the engine mechanism and further renders such engine driven parts removable from the engine proper while they are assembled to facilitate adjustment or repair work.

l/Vith the above and other objects in view the invention consists in the gas engine construction herein claimed and all equivalents.

Referring to the accompanying drawings in which like characters of reference indicate the same parts in the different views: Figure 1 is an elevation of a gas engine constructed in accordance with this invention; Fig. 2 is a sectional elevation thereof; Fig. 3 is a view of the removable plate forming a part of this invention with the engine crank connected therewith; Fig. 4- is a sectional detail view of the removable plate and the mechanism thereon showing the driving connection with the crank shaft of the engine; and, Fig. 5 is a rear view of a fragment of the coupling disk.

In these drawings 10 indicates a frame forming a bearing for a crank shaft 11 which carries the usual flywheel 12 at one end and a crank 13 at the other end, the latter being connected with a piston 1a Specification of Letters Patent.

Patented Feb. 23, 1915.

Serial No. 657,365.

working in a cylinder 15. The frame 10 also forms a crank case 16 which has a circular opening opposite the crank shaft giving free access to the crank chamber and the parts contained therein. A disk shaped plate 17 forms a shouldered cover for said opening and is held in place by screws 18 passing through openings in its edge and threaded in the edges of the crank case.

The plate 17 has a bracket 19 and journaled in bushings through the plate and the bracket is a supplemental shaft 20 in alinement with the crank shaft 11 and having connection therewith so as to perform the functions usually performed by the crank shaft in operating the driven parts of the gas engine mechanism. The driving connection between the supplemental shaft 20 and the crank shaft 11 must be such that it may be readily engaged and disengaged when placing the plate 17 in position on the crank case and removing it therefrom respectively. As here shown such oonnection constitutes a disk 21 keyed on the inner end of supplemental shaft 20 and provided with a notch or recess 22 in its edge to fit upon the opposite flat surfaces 23 on the threaded end of crank 13. The connecting rod 2 1 of piston 14 is clamped upon a sleeve 25 surrounding the crank 13 and held in place thereon by a nut 26 threaded on the reduced end of crank 13 and a pin 27 on the disk 21 stands in the path of the shoulders of said nut to prevent it from turning and working loose. A pinion 28 is also keyed on the inner end of supplemental shaft 20 and meshes with a larger pinion 29 on a stub shaft 30 which is journaled through a bushing in the plate 17 and is thus driven at onehalf the speed of the supplemental shaft 20. On the outer end of shaft 30 is a cam 31 which engages a roller 32 carried by a lever 33 pivotally mounted on plate 17 at 34 and detachably connecting with a valve rod 35 of the exhaust valve 36 of the engine. The cam 31 is provided with a pin 37 projecting from its front face for engaging and connecting a pair of spring contacts 38 of the ignition system, said contacts being insulated and mounted on a plate 39 which is pivotally supported by surrounding the bushing of shaft 30 so as to be capable of swinging around said shaft and thereby vary the position of the spring contacts so as to adjust the timing of the ignition spark with relation to the cycle of operation of theengine. The plate 39 has an arc-shaped slot through which one of the screws 18 passes which permits of the adjustment referred to while said screw is loose and which permits the plate to be locked in its adjustments by tightening the screw; A ball governor 40 is mounted on the supplemental. shaft 20 between the bracket and the platel' and is connected by a yoke lever 41 fulcrumed on the bracket 19 with the throttle valve of a carbureter 42. The extreme end of the supplemental shaft 20 is provided with a screw thread l3 which may be engaged by a notched disk 44 on a lever 45 pivoted on the bracket and constituting a speed indicator by which the speed of the engine may be readily determined.

By means of this invention the gas engine mechanism is madesuitable for ready access to the active parts, making it convenient for use by those who are not particularly skilled in the handling of machines of this character. This assembling of the active driven parts of the engine on the single removable plate makes it possible, in the event of necessity for repairs, that the plate with its parts attached may be removed from the engine and sent to the factory, without the necessity for shipping the entire engine, and makes it further possible to keep at hand other plates with the mechanism attached to substitute in event of accident or need for repairs and thus avoid the necessity for putting the machine out of commission. The removal of the plate with its parts is accomplished by merely detaching the ignition wires, the exhaustrod and the carbureter connection, all of which are designed-for ready detachment, and then removing. the three screws 18. In replacing the plate with its parts assembled it is only necessary to position the notch of disk 21 to correspond with the position of the crank 13 and then return the plate to its seat on the crank case and restore the several connections. The disk 21 will not permit of the plate 17 being reseated on the crank case until proper driving connection is made with the crank 18.

What I claim as new and desire to secure by Letters Patent is:

1. Ina gas engine, the combination with a crank shaft and a crank case provided with an opening, of a plate forming a removable cover for the opening of the crank case, a supplemental shaft journaled in the plate in approximate alinement with the crank shaft, a disk on the supplemental shaft provided with an opening to receive the end of the crank pin of the crank shaft and forming a detachable driving connection between the crank shaft and the supplemental shaft, and engine driven parts of the gas engine connected with the supplemental shaft and removable with the plate.

2. In a gas engine, the combination with a crank shaft and a crank case provided with an opening, of a plate forming a removable cover for the opening of the crank case, a supplemental shaft journaled through the plate, a coupling on the supplemental shaft having an opening to receive the end of the crank pin of the crank shaft, a pinion on the supplemental shaft between the coupling and the plate, a stub shaft journaled through the plate, a pinion thereon meshing with the other pinion, a cam on the stub shaft, a lever fulcrumed on the plate and adapted for connection with the exhaust valve mechanism of the gas engine, a roller on the lever engaging the cam, a pin projecting from the cam, an adjustable plate pivotally mounted on the removable plate, switch contacts carried by the adjustable plate and engaged by the pin, said switch contacts adapted for connection with the ignition system of the gas engine, and screws for clamping the removable plate to the crank case, there being a slotin the adjustable plate through which one of said screws passes for holding said adjustable plate in its adjustments.

3. In a gas engine, the combination with a crank shaft and a crank case provided with an opening, of a plate forming a removable cover for the opening of the crank case, a bracket on the plate, a supplemental shaft journaled through the plate and the bracket, a coupling on the supplemental shaft having an opening to receive the end of the crank pin of the crank shaft, a pinion on the supplemental shaft between the coupling and the plate, a stub shaft journaled through the plate, a pinion thereon meshing with the other pinion, a cam on. the stub shaft, a lever fulcrumed on the plate and adapted for connection with the exhaust valve mechanism of the gas engine, a roller on the lever engaging the cam, a pin projecting from the cam, an adjustable plate pivotally mounted on the removable plate, switch contacts carried by the adjustable plate and engaged by the pin, said switch contacts adapted for connection with the ignition system of the gas engine, a governor on the supplemental shaft between the plate and the bracket adapted for connection with the carbureter of the gas engine, a screw thread on the supplemental shaft, a lever fulcrumed on the bracket, and a toothed disk on the lever adapted to be swung into engagement with the said threads for indicating the speed of the gas engine.

4:. In a gas engine the combination with a crank shaft and a crank case provided with an opening, a plate forming a removable cover for the opening of the crank case, a supplemental shaft journaled through the plate, a coupling on the supplemental shaft having an opening to receive the end of the crank pin of the crank shaft, a pinion on the supplemental shaft between the coupling In testimony whereof, I affix my signaand the plate, a stub shaft journaled through ture, in presence of two Witnesses.

the plate, a pinion thereon meshing With the CHARLES K. SALISBURY. other pinion, and a cam on the stub shaft Witnesses:

outside of the plate for operating the valve KATHERINE HOLT,

mechanism of the engine. R. S. C. CALDWELL.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. G." 

